Which muscle assists with gripping but is not primarily responsible for a "power grip"?

The extensor digitorum plays a role in the gripping process primarily by extending the fingers but is not responsible for facilitating a "power grip." A power grip involves strong flexion of the fingers, where the primary muscles responsible are flexors, including the flexor digitorum superficialis and deeper muscles like the flexor digitorum profundus, which actively contribute to grasping and holding objects securely.

While the intrinsic hand muscles, particularly those of the hypothenar and thenar regions, also contribute to manipulation and grip strength, their primary functions support more refined movements rather than the forceful gripping characteristic of a power grip. Thus, the extensor digitorum's role is more about extension and stabilization rather than providing the gripping strength associated with power grips. This makes it distinct from the other choices, which are more directly involved in the aspects of gripping.